DOI: 10.1007/s10533-017-0351-8
Scopus记录号: 2-s2.0-85020511951
论文题名: Nitrogen dynamics and phytoplankton community structure: the role of organic nutrients
作者: Moschonas G. ; Gowen R.J. ; Paterson R.F. ; Mitchell E. ; Stewart B.M. ; McNeill S. ; Glibert P.M. ; Davidson K.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 134, 期: 2018-01-02 起始页码: 125
结束页码: 145
语种: 英语
英文关键词: Community composition
; Dissolved organic nitrogen
; Nitrogen uptake
; Phytoplankton
Scopus关键词: coastal water
; community composition
; community structure
; diatom
; dissolved organic nitrogen
; fjord
; nitrogen
; nutrient dynamics
; nutrient uptake
; organic compound
; phytoplankton
; primary production
; pristine environment
; Scotland
; United Kingdom
; Chaetoceros
; Pseudo-nitzschia
; Scrippsiella
; Seriata
; Skeletonema
; Thalassiosira
英文摘要: Dissolved organic nitrogen (DON) is recognised as an important N source for phytoplankton. However, its relative importance for phytoplankton nutrition and community composition has not been studied comprehensively. This study, conducted in a typical Scottish fjord, representative of near-pristine coastal environments, evaluates the utilisation of DON and dissolved inorganic nitrogen (DIN) by different microbial size fractions and the relationship of phytoplankton community composition with DON and other parameters. The study demonstrated that DON was important in supporting phytoplankton throughout the yearly production cycle. The higher-than-expected urea uptake rates and large fraction of the spring bloom production supported by DON suggested that organic N not only contributes to regenerated production and to the nutrition of the small phytoplankton fraction, but can also contribute substantially to new production of the larger phytoplankton in coastal waters. Multivariate statistical techniques revealed two phytoplankton assemblages with peaks in abundance at different times of the year: a spring group dominated by Skeletonema spp., Thalassiosira spp., and Pseudo-nitzschia spp. group delicatissima; and a summer/autumn group dominated by Chaetoceros spp., Scrippsiella spp., and Pseudo-nitzschia spp. group seriata. The multivariate pattern in community composition and abundance of these taxa was significantly correlated with the multivariate pattern of DON, urea, dissolved free amino acids, DIN, temperature, salinity, and daylength, with daylength and urea being particularly important, suggesting both physical and chemical controls on community composition. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83262
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: Scottish Association for Marine Science, Argyll, Oban, United Kingdom; Fisheries and Aquatic Ecosystems Branch, Agriculture Food and Environmental Science Division, Agri-Food and Biosciences Institute, Newforge Lane, Belfast, United Kingdom; Horn Point Laboratory, University of Maryland Center for Environmental Science, PO Box 775, Cambridge, MD, United States
Recommended Citation:
Moschonas G.,Gowen R.J.,Paterson R.F.,et al. Nitrogen dynamics and phytoplankton community structure: the role of organic nutrients[J]. Biogeochemistry,2017-01-01,134(2018-01-02)